CN212293749U - Laser cladding powder feeding head - Google Patents
Laser cladding powder feeding head Download PDFInfo
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- CN212293749U CN212293749U CN202020652645.4U CN202020652645U CN212293749U CN 212293749 U CN212293749 U CN 212293749U CN 202020652645 U CN202020652645 U CN 202020652645U CN 212293749 U CN212293749 U CN 212293749U
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Abstract
The utility model discloses a laser cladding powder feeding head, it includes from bottom to top in proper order: the powder mixing cavity is communicated with the powder channel, alloy powder can be secondarily mixed, the powder collides with each other in the mixing process, the powder gathered together in the storage process is scattered again, the flowability of the powder is improved, and pipe blockage is less likely to occur; the utility model discloses rational in infrastructure, control out the powder direction through integrated gas channel, have better result of use.
Description
Technical Field
The utility model belongs to the technical field of laser cladding equipment, concretely relates to laser cladding send whitewashed head.
Background
The laser cladding technology is an important method for direct and rapid laser forming and green laser remanufacturing, cladding materials are added into a working area through a powder feeder in the rapid solidification process, alloys with different components and properties are rapidly melted by utilizing laser beams, and the alloys are directly stacked to form a very compact metal part and an alloy layer with the same components and properties as the part is formed on the surface of the damaged part; laser cladding processing can be divided into two main categories according to the supply mode of materials: the method comprises a preset method and a synchronous powder feeding method, wherein the process of the synchronous powder feeding method is simple, the utilization rate of alloy materials is high, and the method is a preferred method at the present stage, wherein a powder feeder is one of core elements in the laser cladding technology, the powder feeder is a device for mixing and discharging alloy powder, but most powder feeding heads of the powder feeder in the prior art adopt straight pipes, so the powder feeding heads are also called powder outlets and are simple tubular structures, the laser molten pool part is directly discharged from the powder feeding heads after the alloy powder is mixed, the alloy powder inevitably rubs with the powder feeding heads in the process of flowing out of the powder feeding heads, the temperature of the powder feeding heads rises after long-time use, the hardness of the powder feeding heads is reduced, scratches are rubbed with the alloy powder in the process of rubbing, the abrasion is caused, more importantly, certain gas is introduced into the powder feeding heads in the prior art as carrier gas, but the flow rate of the gas is not high, for some non-horizontal surface processing, alloy powder can not completely flow into a laser molten pool and has certain deviation, namely, the gravity of the alloy powder causes the alloy powder to move by taking a parabola as a track, so that the deviation is certain from the position of the laser molten pool, the flow velocity of carrier gas can be increased, the situation can be avoided, but in the prior art, the whole powder feeder needs to be refitted again by increasing the flow velocity of a powder feeding head, the cost is higher, and therefore, the prior art does not provide an effective adjusting method.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a laser cladding send whitewashed head can not only control out the powder direction through the air current, but also can cooperate gaseous flow to reduce and send whitewashed head and the produced temperature of alloy powder friction, improves life.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a laser cladding powder feeding head comprises from bottom to top: the powder mixing device comprises an outer nozzle, a sleeve and a powder mixing cavity, wherein a sealing cover plate is arranged on the end surface of the top end of the powder mixing cavity, a threaded through hole matched with a powder joint bolt is also formed in the sealing cover plate, and the bottom of the powder mixing cavity is communicated with an inner pipe of the sleeve through a pipeline;
the sleeve is of a double-layer tubular structure consisting of inner tubes and outer tubes with the same axis, one end of the inner tube of the sleeve is communicated with the powder mixing cavity, the other end of the inner tube of the sleeve is communicated with the nozzle core in the outer nozzle, one end of the outer tube of the sleeve is fixed on the outer side surface of the powder mixing cavity, the other end of the outer tube of the sleeve is connected with the locking nut, the outer tube of the sleeve is also provided with a protective gas joint, a flow divider is arranged between the sleeve and the outer nozzle and consists of two tubes with the same axis, one end of the tube positioned on the inner side is communicated with the inner tube of the sleeve, the other end of the tube is communicated with one end;
the outer nozzle is of a tubular structure with two open ends, one end of the outer nozzle is connected with the outward pipe of the flow divider, the other end of the outer nozzle is open, a nozzle core is further arranged in the outer nozzle, the nozzle core is a circular pipe with the cross section smaller than the cross section area of the outer nozzle, and the nozzle core is communicated with the inward pipe of the flow divider.
Furthermore, a channel is arranged on the axis position of the powder joint bolt and is communicated with the powder bin part.
Furthermore, an air pressure unloading bolt is further arranged on the sealing cover plate, a through hole is formed in the stud portion of the air pressure unloading bolt, and the through hole can be opened only when the pressure in the powder mixing cavity is large.
Furthermore, the side surface of the powder mixing cavity is an arc surface which shrinks towards the bottom surface.
The utility model discloses following beneficial effect has at least:
(1) still be provided with the powder mixing chamber in sending the powder head, carry out the secondary to the powder and mix, improve the even degree of mixing, can utilize the mutual collision at mixing process alloy powder simultaneously, smash the powder of reuniting originally, guarantee the homogeneity of flow, reduce the emergence of jam.
(2) The alloy powder flow channel is also provided with a gas flow channel outside, the gas flow channel and the alloy powder are discharged simultaneously, and the gas flow drives the powder to move in the discharging process, so that the movement of the alloy powder is better controlled.
(3) The gas that the velocity of flow is faster is introduced to the sleeve pipe skin, except the outflow direction of control powder, can also reduce sleeve pipe temperature, avoids more easily by wearing and tearing after the sleeve pipe temperature rises, and then influences life's problem.
Drawings
The accompanying drawings, which form a part of the specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention.
In the drawings:
fig. 1 schematically shows a schematic structural view of the present invention;
figure 2 schematically illustrates an exploded view of the present invention;
fig. 3 schematically shows a partially enlarged view of a portion a in fig. 1;
wherein the figures include the following reference numerals:
1-external nozzle, 2-nozzle core, 3-locking nut, 4-flow divider, 5-sleeve, 6-protective gas joint, 7-powder mixing cavity, 8-sealing cover plate, 9-powder joint bolt and 10-air pressure unloading bolt.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure; unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application; as used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Spatially relative terms, such as "above … …," "above … …," "above … …, above," "overlying" and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures; it will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures.
Examples
As shown in fig. 1-2, a laser cladding powder feeding head comprises, from bottom to top: outer nozzle 1, sleeve pipe, powder mixing chamber 7, wherein be provided with a powder passageway of compriseing nozzle core 2, sleeve pipe 5 inner tube in the sleeve pipe, all the other spaces and external high-pressure gas intercommunication use as gas passage, gas passage and powder passageway each other not communicate, all discharge from outer nozzle 1 part, and the gas flow velocity is higher than the velocity of flow of carrier gas in the powder passageway in the gas passage, can inject the play powder direction of powder, and gas passage can cool down the powder passageway at the flow in-process simultaneously, increase of service life, powder mixing chamber 7 and powder passageway intercommunication, alloy powder can carry out the secondary and mix, and collision each other between the powder in mixing process will deposit the powder that the in-process gathered together and break up again, improve the mobility of powder, more be difficult to take place stifled pipe.
As shown in figure 1, a sealing cover plate 8 is arranged on the top end face of a powder mixing cavity 7, the sealing cover plate 8 seals the powder mixing cavity 7, a threaded through hole matched with a powder joint bolt 9 is also arranged on the sealing cover plate 8, wherein the shape of the powder joint bolt 9 is the same as that of a bolt in the prior art, the difference is that the screw head part of the bolt is provided with a part connected with a powder bin, a channel is arranged on the axial position of a stud of the powder joint bolt 9 and is communicated with the powder bin part, so that alloy powder can enter the powder mixing cavity 7 through the powder joint bolt 9, the side face of the powder mixing cavity 7 is an arc face shrinking towards the bottom surface, the bottom of the powder mixing cavity 7 is communicated with a sleeve inner tube through a pipeline, the part of the alloy powder which firstly enters the powder mixing cavity 7 can directly enter the sleeve inner tube, and the other part can be temporarily accumulated in the powder, the alloy powder effect that follow-up lets in with before the alloy powder impact of totally entering sleeve 5 inner tube, because prior art all can use a small amount of carrier gas to assist the transportation of alloy powder, these carrier gas carry out the secondary with alloy powder wherein in powder mixing chamber 7 and mix, because alloy powder collides each other in the mixing process, the alloy powder of gathering because of reasons such as humidity originally can be broken up at the in-process of secondary mixing, the mobility of powder in the follow-up use has been guaranteed, be difficult to take place stifled pipe more.
It should be noted that: the sealing cover plate 8 is also provided with an air pressure unloading bolt 10, the structure of the air pressure unloading bolt 10 is the same as that of the prior art, except that a through hole is arranged on a stud part of the air pressure unloading bolt, the through hole is closed most of the time, and the air pressure unloading bolt can be opened only when the pressure in the powder mixing cavity 7 is higher, so that the pressure in the powder mixing cavity 7 is released.
The sleeve is a double-layer tubular structure consisting of an inner tube and an outer tube with the same axis, as shown in figure 1, one end of the inner tube of the sleeve is communicated with a powder mixing cavity 7, the other end of the inner tube of the sleeve is communicated with a nozzle core 2 in an outer nozzle 1, one end of the outer tube of the sleeve 5 is fixed on the outer side surface of the powder mixing cavity, the other end of the outer tube of the sleeve 5 is connected with a locking nut 3, a protective gas joint 6 is arranged on the outer tube of the sleeve 5 and is used for being communicated with an external protective gas supply device, after ventilation is carried out, protective gas enters a part between the outer tube of the sleeve and the inner tube through the protective gas joint 6, the gas flow speed of the protective gas is higher than that of carrier gas, the inner tube can be cooled in the gas flowing process, as the temperature of the inner tube is increased due to friction between alloy powder and the, the occurrence of this situation can be reduced.
Further, as shown in fig. 2, a diverter 4 is arranged between the sleeve 5 and the outer nozzle 1, the diverter 4 is composed of two tubes with the same axis, wherein one end of the tube positioned at the inner side is communicated with the inner tube of the sleeve 5, the other end is communicated with one end of the nozzle core 2, the tube close to the outer side is connected with the outer end of the sleeve through a locking nut 3 to play a role of connecting the sleeve 5 with the outer nozzle 1, the locking nut 3 is connected with the outer tube of the sleeve 5 through threads, as shown in fig. 3, the tube close to the outer side of the diverter 4 is fixed on the locking nut 3, if the sleeve 5 is directly connected with the outer nozzle 1, air leakage is easy to occur at the joint part in the long-term use process, and the diverter 4 is integrally formed, so that the strength of the joint part of the.
As shown in fig. 2, the outer nozzle 1 is a tubular structure with two open ends, one end of the outer nozzle is connected with the outward pipe of the flow divider 4, the other end of the outer nozzle is open, a nozzle core 2 is further arranged in the outer nozzle 1, the nozzle core 2 is a circular pipe with a cross section smaller than the cross section area of the outer nozzle 1, and the nozzle core 2 is communicated with the inward pipe of the flow divider 4.
The powder feeding head of the embodiment can be functionally divided into a powder passage and a gas passage, wherein the powder passage is composed of a powder mixing cavity 7, a sleeve inner tube and a nozzle core 2, the three parts are mutually communicated to form a passage, and powder sequentially passes through the parts and flows out of the nozzle core 2; the gas channel is a channel formed by communicating the space between the outer sleeve pipe and the outer nozzle 1 and the nozzle core 2, the gas enters the outer sleeve pipe from the protective gas joint 6 and flows downwards, enters the part between the outer nozzle 1 and the nozzle core 2 and flows out from the bottom of the outer nozzle 1, and the gas channel is arranged around the powder channel, so that the influence of external airflow on the production process can be reduced, and on the other hand, because the airflow speed in the gas channel is higher, the powder can be accelerated by the airflow after being sprayed out from the nozzle core 2, and the outflow direction of the powder can be better controlled; on the other hand, the gas channel is arranged close to the powder channel and can cool the powder channel.
In this embodiment, the shielding gas joint is a mature prior art and can be purchased directly, and thus will not be described in detail.
Claims (4)
1. A laser cladding powder feeding head is characterized in that: include from bottom to top in proper order: the powder mixing device comprises an outer nozzle, a sleeve and a powder mixing cavity, wherein a sealing cover plate is arranged on the end surface of the top end of the powder mixing cavity, a threaded through hole matched with a powder joint bolt is also formed in the sealing cover plate, and the bottom of the powder mixing cavity is communicated with an inner pipe of the sleeve through a pipeline;
the sleeve is of a double-layer tubular structure consisting of inner tubes and outer tubes with the same axis, one end of the inner tube of the sleeve is communicated with the powder mixing cavity, the other end of the inner tube of the sleeve is communicated with the nozzle core in the outer nozzle, one end of the outer tube of the sleeve is fixed on the outer side surface of the powder mixing cavity, the other end of the outer tube of the sleeve is connected with the locking nut, the outer tube of the sleeve is also provided with a protective gas joint, a flow divider is arranged between the sleeve and the outer nozzle and consists of two tubes with the same axis, one end of the tube positioned on the inner side is communicated with the inner tube of the sleeve, the other end of the tube is communicated with one end;
the outer nozzle is of a tubular structure with two open ends, one end of the outer nozzle is connected with the outward pipe of the flow divider, the other end of the outer nozzle is open, a nozzle core is further arranged in the outer nozzle, the nozzle core is a circular pipe with the cross section smaller than the cross section area of the outer nozzle, and the nozzle core is communicated with the inward pipe of the flow divider.
2. The laser cladding powder feeding head of claim 1, wherein: and a channel is arranged on the axis position of the powder joint bolt and is communicated with the powder bin part.
3. The laser cladding powder feeding head of claim 1, wherein: the sealing cover plate is also provided with an air pressure unloading bolt, a through hole is formed in the stud part of the air pressure unloading bolt, and the through hole can be opened only when the pressure in the powder mixing cavity is higher.
4. The laser cladding powder feeding head of claim 1, wherein: the side surface of the powder mixing cavity is an arc surface which shrinks towards the bottom surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020652645.4U CN212293749U (en) | 2020-04-26 | 2020-04-26 | Laser cladding powder feeding head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020652645.4U CN212293749U (en) | 2020-04-26 | 2020-04-26 | Laser cladding powder feeding head |
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| CN212293749U true CN212293749U (en) | 2021-01-05 |
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| CN202020652645.4U Active CN212293749U (en) | 2020-04-26 | 2020-04-26 | Laser cladding powder feeding head |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115415551A (en) * | 2022-09-23 | 2022-12-02 | 无锡有田五维增材科技有限公司 | High-precision 3D printer for titanium alloy for aviation and printing method thereof |
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2020
- 2020-04-26 CN CN202020652645.4U patent/CN212293749U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115415551A (en) * | 2022-09-23 | 2022-12-02 | 无锡有田五维增材科技有限公司 | High-precision 3D printer for titanium alloy for aviation and printing method thereof |
| CN115415551B (en) * | 2022-09-23 | 2024-04-05 | 无锡有田五维增材科技有限公司 | High-precision 3D printer for aviation titanium alloy and printing method thereof |
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